Sky-Watcher Heliostar H-alpha 76 mm OTA

Heliostar 76 Hα — dedicated hydrogen-alpha solar telescope

The Heliostar 76 is a dedicated 76 mm hydrogen-alpha solar telescope with a 630 mm focal length and a bandpass below 0.5 Å. It is designed to reveal prominences and solar hydrogen-alpha detail using its integrated filtering system.

Optical system

The 76 mm model has a 630 mm f/8.3 optical system. The manual lists a dedicated solar zenith prism, a 20 mm 70° wide-angle eyepiece and a smartphone adapter. Allow more than 30 minutes for the telescope and etalon chamber to reach outdoor temperature before observing.

Mounting and focusing

The OTA weighs 3.8 kg and measures 590 mm according to the manual. Its solar guider provides aiming assistance; tune and focus using the manufacturer’s operating procedure.

Essential solar configuration

Observe only with the complete, undamaged original solar-filter system and its dedicated solar diagonal fitted as instructed. Replacing the solar diagonal with an ordinary star diagonal removes essential filtering. Read the manufacturer’s solar operating instructions before use.

Sky-Watcher manufacturer documentation

Sky-Watcher solar product page

Compatibility notes

Manual gives 590 mm length; the web table rounds to 600 mm. Manual configuration retained.

Additional specifications